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Learn a Fact: 1 x 9

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X 8
8
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X 0
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0
x  6
2
0
x  4
3
1
x  6
4
8
x  0
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1
x  2
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x  0
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5
x  1
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x  0
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x  1
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x  9
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x  1
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x  1
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x  7
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x  8
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x  1
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x  9
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